print("комментарии для пользователя:")
s=input ()
s1=""
for c in s:
    if c =="[":
        s1 += c
    if c == "]":
        if len(s1) > 0:
            if s1[len(s1) - 1] == "[":
                s1 = s1[:-1]
    if c == "(":
        s1 += c
    if c == ")":
        if len(s1)>0:
            if s1[len(s1)-1] == "(":
                s1=s1[:-1]
    if c =="{":
        s1 += c
    if c == "}":
        if len(s1) > 0:
            if s1[len(s1) - 1] == "{":
                s1 = s1[:-1]
    if c =="<":
        s1 += c
    if c == ">":
        if len(s1) > 0:
            if s1[len(s1) - 1] == "<":
                s1 = s1[:-1]
if len(s1) == 0:
    print("True")
else:
    print("False")
